2ano

<StructureSection load='2ano' size='340' side='right' caption='[[2ano]], [[Resolution|resolution]] 2.68&Aring;' scene=''>

<table><tr><td colspan='2'>[[2ano]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/"bacillus_coli"_migula_1895 "bacillus coli" migula 1895]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2ANO OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ANO FirstGlance]. <br>

</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=817:1-{[N-(1-IMINO-GUANIDINO-METHYL)]SULFANYLMETHYL}-3-TRIFLUOROMETHYL-BENZENE'>817</scene>, <scene name='pdbligand=MN:MANGANESE+(II)+ION'>MN</scene>, <scene name='pdbligand=NDP:NADPH+DIHYDRO-NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NDP</scene></td></tr>

<tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/Dihydrofolate_reductase Dihydrofolate reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.5.1.3 1.5.1.3] </span></td></tr>

<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2ano FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ano OCA], [http://pdbe.org/2ano PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2ano RCSB], [http://www.ebi.ac.uk/pdbsum/2ano PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2ano ProSAT]</span></td></tr>

[[http://www.uniprot.org/uniprot/DYR_ECOLI DYR_ECOLI]] Key enzyme in folate metabolism. Catalyzes an essential reaction for de novo glycine and purine synthesis, and for DNA precursor synthesis.

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== Publication Abstract from PubMed ==

Dihydrofolate reductase (DHFR) is a vital metabolic enzyme and thus a clinically prominent target in the design of antimetabolites. In this work, we identify 1,4-bis-{[N-(1-imino-1-guanidino-methyl)]sulfanylmethyl}-3,6-dimethyl-benz ene (compound 1) as the correct structure of the previously reported DHFR inhibitor 1,4-bis-{(iminothioureidomethyl)aminomethyl}-3,6-dimethyl-benzene (compound 2). The fact that compound 1 has an uncharacteristic structure for DHFR inhibitors, and an affinity (KI of 11.5 nM) comparable to potent inhibitors such as methotrexate and trimethoprim, made this inhibitor of interest for further analysis. We have conducted a characterization of the primary interactions of compound 1 and DHFR using a combination of X-ray structure and SAR analysis. The crystal structure of E. coli DHFR in complex with compound 1 and NADPH reveals that one portion of this inhibitor exploits a unique binding surface, the M20 loop. The importance of this interface was further confirmed by SAR analysis and additional structural characterization.

A 2.13 A structure of E. coli dihydrofolate reductase bound to a novel competitive inhibitor reveals a new binding surface involving the M20 loop region.,Summerfield RL, Daigle DM, Mayer S, Mallik D, Hughes DW, Jackson SG, Sulek M, Organ MG, Brown ED, Junop MS J Med Chem. 2006 Nov 30;49(24):6977-86. PMID:17125251<ref>PMID:17125251</ref>

From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>

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<div class="pdbe-citations 2ano" style="background-color:#fffaf0;"></div>

*[[Dihydrofolate reductase|Dihydrofolate reductase]]

[[Category: Bacillus coli migula 1895]]

[[Category: Dihydrofolate reductase]]

[[Category: Brown, E D]]

[[Category: Daigle, D M]]

[[Category: Hughes, D W]]

[[Category: Jackson, S G]]

[[Category: Junop, M S]]

[[Category: Mayer, S]]

[[Category: Organ, M]]

[[Category: Summerfield, R L]]

[[Category: Protein inhibitor complex]]